This isn't really much of a hack so much as a demonstration of how easy it is to do some neat things with the mac68k.info infrastructure.
I got an original B&W serial QuickCam today, connected it up to a machine that was already connected to the appletalk vpn service, and ran the QuickPICT program that came with the QuickCam. It then takes pictures periodically and saves them to my public area on the appleshare server. Presto! 1994 era webcam!